<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    table{
      border-collapse: collapse;
      text-align: center;
    }
    td{
      padding: 10px 20px;
      border: 1px solid black;
    }
  </style>
</head>
<body>
  <table>
    <tr>
      <td colspan="2">1-1</td>
      <!-- <td>1-2</td> -->
      <td rowspan="2">1-3</td>
      <td>1-4</td>
    </tr>
    <tr>
      <td>2-1</td>
      <td>2-2</td>
      <!-- <td>2-3</td> -->
      <td>2-4</td>
    </tr>
  </table>
</body>
</html>